Display device

Abstract

A light absorbing member includes a first dichroic dye and a second dichroic dye. The first dichroic dye has an absorption peak wavelength between a first emission peak wavelength of the first light-emitting layer and a second emission peak wavelength of a second light-emitting layer. The second dichroic dye has an absorption peak wavelength between the second emission peak wavelength of the second light-emitting layer and a third emission peak wavelength of the third light-emitting layer. An angle of a molecule of the first dichroic dye in an absorption axis and an angle of a molecule of the second dichroic dye in an absorption axis with respect to a normal direction of the reflective layer are from 70 degrees to 90 degrees.

The invention claimed is: 
     
       1. A display device comprising:
 a first light-emitting layer having a first emission peak wavelength; 
 a second light-emitting layer having a second emission peak wavelength longer than the first emission peak wavelength; 
 a third light-emitting layer having a third emission peak wavelength longer than the second emission peak wavelength; 
 a reflective layer configured to reflect light, the reflective layer being provided as a lower layer to the first light-emitting layer, the second light-emitting layer, and the third light-emitting layer; and 
 a light absorbing member including at least one kind selected from a first dichroic dye and a second dichroic dye, the light absorbing member being provided as an upper layer to the first light-emitting layer, the second light-emitting layer, and the third light-emitting layer, 
 wherein the first dichroic dye has an absorption peak wavelength between the first emission peak wavelength and the second emission peak wavelength, 
 the second dichroic dye has an absorption peak wavelength between the second emission peak wavelength and the third emission peak wavelength, 
 an angle of a molecule of the first dichroic dye in an absorption axis direction and an angle of a molecule of the second dichroic dye in an absorption axis direction with respect to a normal direction of the reflective layer are from 70 degrees to 90 degrees, 
 a difference between the second emission peak wavelength and the first emission peak wavelength is more than an average value of a full width half maximum of a spectrum of light emitted from the first light-emitting layer and a full width half maximum of a spectrum of light emitted from the second light-emitting layer, and 
 a difference between the third emission peak wavelength and the second emission wavelength is more than an average value of the full width half maximum of the spectrum of the light emitted from the second light-emitting layer and a full width halt maximum of a spectrum of light emitted from the third light-emitting layer. 
 
     
     
       2. The display device according to  claim 1 ,
 wherein the light absorbing member includes both the first dichroic dye and the second dichroic dye. 
 
     
     
       3. The display device according to  claim 1 ,
 wherein the absorption axis direction of the molecule of the first dichroic dye and the absorption axis direction of the molecule of the second dichroic dye are orthogonal to a normal direction of each of the first light-emitting layer, the second light-emitting layer, and the third light-emitting layer. 
 
     
     
       4. The display device according to  claim 1 ,
 wherein the absorption axis direction of the molecule of the first dichroic dye and the absorption axis direction of the molecule of the second dichroic dye are random as seen in the normal direction of each of the first light-emitting layer, the second light-emitting layer, and the third light-emitting layer. 
 
     
     
       5. The display device according to  claim 1 ,
 wherein the light absorbing member further includes a λ/4 retardation layer, 
 the λ/4 retardation layer is arranged on a side closer to the first light-emitting layer, the second light-emitting layer, and the third light-emitting layer, and 
 the absorption axis direction of the molecule of the first dichroic dye and the absorption axis direction of the molecule of the second dichroic dye are aligned at an angle of 45 degrees with respect to an optical axis of the λ/4 retardation layer as seen in the normal direction of each of the first light-emitting layer, the second light-emitting layer, and the third light-emitting layer. 
 
     
     
       6. The display device according to  claim 1 ,
 wherein the light absorbing member includes a first light absorbing member and a second light absorbing member, 
 the first light absorbing member includes the first dichroic dye, and 
 the second light absorbing member includes the second dichroic dye. 
 
     
     
       7. The display device according to  claim 6 ,
 wherein a second sealing layer is provided to the light absorbing member on a side opposite to a side to which the first light-emitting layer, the second light-emitting layer, and the third light-emitting layer are provided. 
 
     
     
       8. The display device according to  claim 6 ,
 wherein a first sealing layer is provided between the light absorbing member and the second electrode, 
 a second sealing layer is provided to the light absorbing member on a side opposite to a side to which the first light-emitting layer, the second light-emitting layer, and the third light-emitting layer are provided, 
 the first sealing layer and the second sealing layer are inorganic films, and 
 the second sealing layer is held in contact with an end of the light absorbing member and in contact with a surface of the first sealing layer in a frame region. 
 
     
     
       9. The display device according to  claim 1 ,
 wherein on a substrate, (i) active element layers forming a plurality of active elements, (ii) the first light-emitting layer, (iii) the second light-emitting layer, (iv) the third light-emitting layer, and (v) the light absorbing member are provided in an order of (i) through (v) from the substrate side, and 
 each of the first light-emitting layer, the second light-emitting layer, and the third light-emitting layer is formed between a first electrode being the reflective layer and a second electrode. 
 
     
     
       10. The display device according to  claim 9 ,
 wherein a first sealing layer is provided between the light absorbing member and the second electrode. 
 
     
     
       11. The display device according to  claim 1 , further comprising:
 a light source portion configured to irradiate the second light-emitting layer and the third light-emitting layer with light, the light source portion being provided between at least the second light-emitting layer and the third light-emitting layer, and the reflective layer, 
 wherein the second light-emitting layer and the third light-emitting layer emit light by being irradiated by the light source portion with the light. 
 
     
     
       12. The display device according to  claim 11 ,
 wherein the light source portion includes the first light-emitting layer, and emits light having the first emission peak wavelength. 
 
     
     
       13. The display device according to  claim 1 ,
 wherein at least one layer on a viewer side to the first light-emitting layer, the second light-emitting layer, and the third light-emitting layer includes at least one of a first nanoparticle and a second nanoparticle, the first nanoparticle having an absorption peak wavelength between the first emission peak wavelength and the second emission peak wavelength, the second nano particle having an absorption peak wavelength between the second emission peak wavelength and the third emission peak wavelength. 
 
     
     
       14. The display device according to  claim 1 ,
 wherein at least one layer on a viewer side to the first light-emitting layer, the second light-emitting layer, and the third light-emitting layer includes a first absorbent configured to absorb light having a wavelength shorter than the first emission peak wavelength. 
 
     
     
       15. The display device according to  claim 14 ,
 wherein at least one layer on the viewer side to the first light-emitting layer, the second light-emitting layer, and the third light-emitting layer is an adhesive material layer provided to the light absorbing member or the light absorbing member on a side to which the first light-emitting layer, the second light-emitting layer, and the third light-emitting layer are provided. 
 
     
     
       16. The display device according to  claim 1 ,
 wherein at least one layer on a viewer side to the first light-emitting layer, the second light-emitting layer, and the third light-emitting layer includes a second absorbent configured to absorb light having a wavelength longer than the third emission peak wavelength. 
 
     
     
       17. The display device according to  claim 1 ,
 wherein the first light-emitting layer, the second light-emitting layer, and the third light-emitting layer are light-emitting layers including quantum dots. 
 
     
     
       18. A display device comprising:
 a first light-emitting layer having a first emission peak wavelength; 
 a second light-emitting layer having a second emission peak wavelength longer than the first emission peak wavelength; 
 a third light-emitting layer having a third emission peak wavelength longer than the second emission peak wavelength; 
 a reflective layer configured to reflect light, the reflective layer being provided as a lower layer to the first light-emitting layer, the second light-emitting layer, and the third light-emitting layer; and 
 a light absorbing member including at least one kind selected from a first dichroic dye and a second dichroic dye, the light absorbing member being provided as an upper layer to the first light-emitting layer, the second light-emitting layer, and the third light-emitting layer, 
 wherein the first dichroic dye has an absorption peak wavelength between the first emission peak wavelength and the second emission peak wavelength, 
 the second dichroic dye has an absorption peak wavelength between the second emission peak wavelength and the third emission peak wavelength, 
 an angle of a molecule of the first dichroic dye in an absorption axis direction and an angle of a molecule of the second dichroic dye in an absorption axis direction with respect to a normal direction of the reflective layer are from 70 degrees to 90 degrees, and 
 a difference between the absorption peak wavelength of the second dichroic dye and the absorption peak wavelength of the first dichroic dye is more than the full width half maximum of the spectrum of the light emitted from the second light-emitting layer. 
 
     
     
       19. A display device comprising:
 A display device comprising: 
 a first light-emitting layer having a first emission peak wavelength; 
 a second light-emitting layer having a second emission peak wavelength longer than the first emission peak wavelength; 
 a third light-emitting layer having a third emission peak wavelength longer than the second emission peak wavelength; 
 a reflective layer configured to reflect light, the reflective layer being provided as a lower layer to the first light-emitting layer, the second light-emitting layer, and the third light-emitting layer; and 
 a light absorbing member including at least one kind selected from a first dichroic dye and a second dichroic dye, the light absorbing member being provided as an upper layer to the first light-emitting layer, the second light-emitting layer, and the third light-emitting layer, 
 wherein the first dichroic dye has an absorption peak wavelength between the first emission peak wavelength and the second emission peak wavelength, 
 the second dichroic dye has an absorption peak wavelength between the second emission peak wavelength and the third emission peak wavelength, 
 an angle of a molecule of the first dichroic dye in an absorption axis direction and an angle of a molecule of the second dichroic dye in an absorption axis direction with respect to a normal direction of the reflective layer are from 70 degrees to 90 degrees, and 
 the difference between the second emission peak wavelength and the first emission peak wavelength and the difference between the third emission peak wavelength and the second emission peak wavelength are equal to or more than 50 nm.